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planetary wave-type oscillations in the ionosphere and their relationship to mesospheric/lower thermospheric *** disturbances at Wuhan(30.61N,114.51E)

Planetary wave-type oscillations in the ionosphere and their...

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中国科学院地质与地球物理研究所2006学术年会

作者： J.Xiong~(a,_),W.Wan~a,B.Ning~a,L.Liu~a,Y.Gao~b a Institute of Geology and Geophysics,The Chinese Academy of Sciences,P.O.Box 9825,Beijing 100029,PR China b Institute of Geophysics,China Seismological Bureau,Beijing,PR China

Using wind,ionospheric and geomagnetic intensity data observed simultaneously at Wuhan(30.61N,114.51E) in 2002 and 2003,planetary wave type oscillations(PWTO) in the ionosphere and their relationship with oscillations in the mesosphere/lower thermosphere(MLT) and geomagnetic intensity have been *** cases of 2- and 5-day oscillations in the ionosphere are analyzed to distinguish MLT drivers and geomagnetic *** geomagnetic oscillations are the most important drivers for the PWTO with dominant periods of 5-,10-, *** the planetary waves in MLT winds are the main drivers for the quasi-2-day oscillations in the *** correlation coefficient of the occurrence rates of the 2-day oscillation in winds and in ionospheric f0F2 is 0.82 for the data from February to *** oscillations in the geomagnetic intensity can drive 30-50%of 5-,10- and 13.5-day PWTO events in the *** we evaluate all of the possible events driven by geomagnetic oscillations, more than 70%of the events have a relationship with geomagnetic oscillations with 5- and 10-day *** 39.7 h PWTO in ionospheric plasma frequencies observed from day 161 to 166 in 2002,are generated by an upward propagating wave with period 43.8 *** events of 6-day oscillations in the ionosphere observed during May to July in 2003,have different *** first one is probably generated by 5.4-day upward propagating waves in MLT winds,but enhanced during a moderate geomagnetic *** second one is generated by the geomagnetic oscillations during a strong geomagnetic storm,r 2005 Elsevier *** rights reserved.

关键词： planetary wave Ionosphere Mesosphere and lower thermosphere

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Inter-annual variations of 6.5-day planetary waves and their relations with QBO

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Earth and planetary Physics 2022年第2期6卷 135-148页

作者： YingYing Huang Jun Cui HuiJun Li ChongYin Li National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China State Key Laboratory of Space Weather Chinese Academy of SciencesBeijing 100101China CAS Key Laboratory of Lunar and Deep Space Exploration National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China planetary Environmental and Astrobiological Research Laboratory(PEARL) School of Atmospheric SciencesSun Yat-sen UniversityZhuhai Guangdong 519082China School of Atmospheric Sciences Sun Yat-Sen UniversityZhuhai Guangdong 519082China College of Astronautics Nanjing University of Aeronautics and AstronauticsNanjing 210016China LASG Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

This paper studies inter-annual variations of 6.5-Day waves(6.5 DWs) observed at altitudes 20-110 km between 52°S-52°N latitudes during March 2002-January 2021, and how these variations were related to the equatorial stratospheric Quasi-Biennial Oscillation(QBO). Temperature amplitudes of the 6.5 DWs are calculated based on SABER/TIMED observations. QBO zonal winds are obtained from an ERA5 reanalysis dataset. QBO phases are derived using an Empirical Orthogonal Functions(EOF) method. wavelet analysis of the observed 6.5 DW variations demonstrates obvious spectral maximums around 28-38 months at 32°N-52°N, and around 26-30 months at 32°S-52°S. In the Northern Hemisphere, peak periods lengthened poleward;in the Southern Hemisphere, however,they were unchanged with latitude. Residual 6.5 DWs amplitudes have been determined by removing composite amplitudes from 6.5 DWs amplitudes. Comparisons between QBO and monthly maximum residual 6.5 DWs amplitudes(AMmax) show clear correlations between the QBO and 6.5 DWs in both hemispheres, but the observed relationship is stronger in the NH. When AMmax NH, the mean QBO profile was easterly at all levels from 70 to 5 hPa;when the AMmax below 30 hPa. Linear Pearson correlation coefficients between QBO phases and AMmax 20°N-52°N in April and around 64 km at 24°S in February, and large negative values from 80 to 110 km between 20°N-50°N in August and at 96-106 km between 20°S-44°S in February. These results indicate quantitative correlations between QBO and 6.5 DWs and provide credible evidences for further studies of QBO modulations on long-term variations of 6.5 DWs.

关键词： planetary wave quasi-biennial osillations wave-flow interactions satellite observation

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Responses of planetary waves to Global Warming: Implications from CMIP3 4×CO_2 Experiments

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Atmospheric and Oceanic Science Letters 2013年第2期6卷 109-116页

作者： WEN Xin-Yu JIA Zhe TAN Ben-Kui Department of Atmospheric and Oceanic Sciences School of Physics Peking University Laboratory for Climate and Ocean-Atmosphere Studies Peking University

The planetary wave response to global warm ing with single forcing of greenhouse gases （GHGs） is investigated in this study by using a total of 11 model results that anticipated CMIP3 4XCO2 experiments. It is shown that the amplitudes of the planetary wave fluxes over Siberia, the Eastern North Pacific, and the North Atlantic decrease by approximately -10% to -30% in the warming context. In particular, the vertical wave flux over the Eastern North Pacific significantly decreases by -28.6%. The weakening of the planetary waves is partly associated with the decreased land-sea thermal contrast, which may be caused by the radiation effect of CO2 and the different surface heat capacities of land and sea. The present work provides a clear understanding of the re sponses of planetary waves to GHGs forcing.

关键词： planetary wave stationary-wave globalwarming 4~CO2 experiments

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Middle Stratospheric Polar Vortex Ozone Budget during the Warming Arctic Winter, 2002-2003

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Advances in Atmospheric Sciences 2011年第5期28卷 985-996页

作者：刘毅刘传熙铁学熙高守亭 Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029 Graduate University of Chinese Academy of Sciences Beijing 100049 National Center for Atmospheric Research BoulderColoradoUSA Laboratory of Cloud Precipitation Physicsand Severe Storms Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029

The ozone budget inside the middle stratospheric polar vortex （24-36 km） during the 2002-2003 Arctic winter is studied by analyzing Michelson Interferometer for Passive Atmospheric Sounding （MIPAS） satellite data.A comprehensive global chemical transport model （Model for Ozone and Related Chemical Tracers,MOZART-3） is used to analyze the observed variation in polar vortex ozone during the stratospheric sudden warming （SSW） *** MIPAS measurement and MOZART-3 calculation show that a pronounced increase （26-28 DU） in the polar vortex ozone due to the SSW *** to the weakening of the polar vortex,the exchange of ozone mass across the edge of the polar vortex increases substantially and amounts to about 3.0 × 10 7 kg according to MOZART-3 *** enhanced downward transport offsets about 80% of polar vortex ozone mass increase by horizontal transport.A ＂passive ozone＂ experiment shows that only ～55% of the vertical ozone mass flux in February and March can be attributed to the variation in vertical *** is also shown that the enhanced downward ozone above ～32 km should be attributed to the springtime photochemical ozone *** to the increase of air temperature,the NO x reaction rate increases by 40%-80% during the SSW *** a result,NO x catalytic cycle causes another 44% decrease in polar vortex ozone compared to the net ozone changes due to dynamical *** is also shown that the largest change in polar vortex ozone is due to horizontal advection by planetary waves in January 2003.

关键词： stratospheric sudden warming planetary wave MIPAS MOZART-3 model ozone depletion

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DYNAMICS OF THE ZONAL ASYMMETRIC STRUCTURE OF ARCTIC OSCILLATION

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Journal of Hydrodynamics 2004年第5期16卷 533-536页

作者： WANGXiu-hong YUWei-dong LUOTi-qian SchoolofEnergyandPowerEngineering JiangsuUniversityZhenjiang212013China KeyLaboratoryofMarineScienceandNumericalmodeling TheFirstInstituteofOceanographyStateOceanicAdministrationQingdao266061China

The Arctic Oscillation (AO), though basically is a zonal symmetricphenomenon, also shows zonal asymmetric variation. The dynamics of this zonal variation isconsidered here from the point of view of the planetary propagation on the earth sphere. Based onthe linear barotropic vorticity e-quation, the planetary wave ray path is calculated in the winterJanuary. It shows that NAO( North Atlantic Oscillation), AO and North Pacific could be linkedthrough the planetary wave propagation, which acts as the atmospheric bridge. The zonal symmetricand asymmetric structures both have association with these Rossby wave activities.

关键词： planetary wave arctic oscillation (AO) zonal asymmetric structure

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Advances in Studies of the Middle and Upper Atmosphere and Their Coupling with the Lower Atmosphere

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Advances in Atmospheric Sciences 2004年第3期21卷 361-368页

作者：吕达仁易帆徐寄遥 Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 College of Electronic Engineering Wuhan University Wuhan 430072 Center for Space Science and Application Research Chinese Academy of Sciences Beijing 100080ecent advances in studies of the middle and upper atmosphere and their coupling with the lower atmosphere in China are briefly reviewed. This review emphasizes four aspects: (1) Development of instrumentation for middle and upper atmosphere observation (2) Analyses and observation of middle and upper atmosphere (3) Theoretical and modeling studies of planetary wave and gravity wave activities in the middle atmosphere and their relation to lower atmospheric processes (4) Study on the coupling between the stratosphere and the troposphere.

Recent advances in studies of the middle and upper atmosphere and their coupling with the lower atmosphere in China are briefly reviewed. This review emphasizes four aspects: (1) Development of instrumentation for middle and upper atmosphere observation; (2) Analyses and observation of middle and upper atmosphere; (3) Theoretical and modeling studies of planetary wave and gravity wave activities in the middle atmosphere and their relation to lower atmospheric processes; (4) Study on the coupling between the stratosphere and the troposphere.

关键词： middle and upper atmosphere gravity wave planetary wave stratosphere-troposphere ex-change (STE) stratospheric ozone

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Overview of the Major 2012–2013 Northern Hemisphere Stratospheric Sudden Warming:Evolution and Its Association with Surface Weather

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Journal of Meteorological Research 2014年第4期28卷 561-575页

作者：刘毅张玉李 Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of Sciences University of Chinese Academy of Sciences

In this study, we analyzed the dynamical evolution of the ma jor 2012-2013 Northern Hemisphere （NH） stratospheric sudden warming （SSW） on the basis of ERA-Interim reanalysis data provided by the ECMWF. The intermittent upward-propagating planetary wave activities beginning in late November 2012 led to a prominent wavenumber-2 disturbance of the polar vortex in early December 2012. However, no major SSW occurred. In mid December 2012, when the polar vortex had not fully recovered, a mixture of persistent wavenumber-1 and -2 planetary waves led to gradual weakening of the polar vortex before the vortex split on 7 January 2013. Evolution of the geopotential height and Eliassen-Palm flux between 500 and 5 hPa indicates that the frequent occurrence of tropospheric ridges over North Pacific and the west coast of North America contributed to the pronounced upward planetary wave activities throughout the troposphere and stratosphere. After mid January 2013, the wavenumber-2 planetary waves became enhanced again within the troposphere, with a deepened trough over East Asia and North America and two ridges between the troughs. The enhanced tropospheric planetary waves may contribute to the long-lasting splitting of the polar vortex in the lower stratosphere. The 2012-2013 SSW shows combined features of both vortex displacement and vortex splitting. Therefore, the anomalies of tropospheric circulation and surface temperature after the 2012-2013 SSW resemble neither vortex-displaced nor vortex-split SSWs, but the combination of all SSWs. The remarkable tropospheric ridge extending from the Bering Sea into the Arctic Ocean together with the resulting deepened East Asian trough may play important roles in bringing cold air from the high Arctic to central North America and northern Eurasia at the surface.

关键词： stratospheric sudden warming polar vortex splitting planetary wave Eliassen-Palm flux cold wave

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On the Formation and Maintenance of the Persistent Anomalies of Summertime Circulation over the Ural Mountains

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Advances in Atmospheric Sciences 2001年第5期18卷 819-830页

作者：李双林纪立人林万涛 LASG Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China

The formation and maintenance of the persistent anomalies (PA hereafter) of summertime circulation over the Ural Mountains are studied, and a two-way interaction of transient eddies and time-mean flow that may be involved in the evolution of the positive anomaly is demonstrated. Firstly the feature of synoptic-scale transient activity during the PA period is investigated based on composite, and the results suggest a significant enhancement of transient activity over the sector from the central North Atlantic to the coastal western Europe for the positive cases whereas a weakening is for the negative. Numerical simulations are conducted using a barotropic primitive equation model linearized about two time-mean flows, the composite of positive cases and the climatological July mean respectively. The results show that the enhanced transient activity upstream will favor positive height anomalies over the Ural Mountains. A barotropic stormtrack model is developed, by which the role of time-mean flow in organization and modulation of transient eddies is studied. It is shown that the growth of ridge over the Ural Mountains tends to organize transient eddies into the region upstream from the central North Atlantic to the coastal western Europe. Combining the two aspects, a positive feedback mechanism through two-direction interaction of transient eddies and basic flow is proposed, which can be responsible for the formation and maintenance of the persistent positive anomalies over the Ural Mountains.

关键词： persistent anomaly transient forcing planetary wave two-way interaction

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Impact of global sea surface temperature on the recent early winter Arctic tropospheric warming in coordinated large ensemble simulations

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Atmospheric and Oceanic Science Letters 2021年第1期14卷 57-62页

作者： Lutao Wang Yongqi Gao Dong Guo Tao Wang Ying Zhang Wei Hua School of Atmospheric Science Chengdu University of Information TechnologyChengduChina Nansen-Zhu International Research Center Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina Nansen Environmental and Remote Sensing Center and Bjerknes Centre for Climate Research BergenNorway Climate Change Research Center Chinese Academy of SciencesBeijingChina Joint Laboratory for Climate and Environmental Change Chengdu University of Information TechnologyChengduChina Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and TechnologyNanjingChina

Coordinated numerical ensemble experiments with six different state-of-the-art atmosphere models were used to evaluate and quantify the impact of global SST(from reanalysis data)on the early winter Arctic warming during *** sets of experiments were designed:in the first set(EXP1),OISSTv2 daily sea-ice concentration and SST variations were used as the lower boundary forcing,while in the second set(EXP2)the SST data were replaced by the daily SST *** the results,the multi-model ensemble mean of EXP1 showed a nearsurface(~850 hPa)warming trend of 0.4℃/10 yr,which was 80%of the warming trend in the *** simulated warming trend was robust across the six models,with a magnitude of 0.36-0.50℃/10 *** global SST could explain most of the simulated warming trend in EXP1 in the mid and low troposphere over the Arctic,and accounted for 58%of the simulated near-surface *** results also suggest that the uppertropospheric warming(~200 hPa)over the Arctic in the reanalysis is likely not a forced signal;rather,it is caused by natural climate *** source regions that can potentially impact the early winter Arctic warming are explored and the limitations of the study are discussed.

关键词： Arctic warming Sea surface temperature Multi-model coordinated experiment Eliassen-Palm flux planetary wave

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